A threaded tapered sleeve crimp connector for connecting round steel grounding electrodes

Abstract

The application discloses a threaded taper sleeve compression connector for connecting round steel grounding bodies, which comprises a connector for connecting round steel bodies, a compression part matched in the connector, and a locking assembly arranged outside the connector for limiting the compression part, so as to lock two round steel bodies in the connector without fire and seal the connector; the connector comprises a double-end screw cylinder with a variable-diameter channel, the variable-diameter channel is a special-shaped hole with a narrow center and expanded two ends, and the double-end screw cylinder is provided with threaded parts at two ends; the compression part comprises a conical compression cylinder provided with a deformation groove on the outer periphery, so as to improve the friction between the round steel body and the variable-diameter channel; and the locking assembly comprises a threaded cap threadedly connected with the threaded part, and the threaded cap is provided with a sealing part at the end away from the double-end screw cylinder. The threaded taper sleeve compression connector can solve the problem that the anticorrosion coating of the round steel grounding body is damaged when the round steel grounding bodies are connected without fire in the prior art.

Description

Technical Field

[0001] This invention relates to the field of power distribution network line connection technology, and specifically to a threaded tapered sleeve crimping connector for connecting round steel grounding bodies. Background Technology

[0002] The grounding device of overhead transmission line towers is a fundamental lightning protection facility for transmission lines, serving as the cornerstone for ensuring personal and equipment safety and guaranteeing the reliable and safe operation of the power system. In my country, the grounding material for transmission line towers is primarily hot-dip galvanized round steel, and its construction connections mainly utilize arc welding. This process generates a large number of sparks that scatter in all directions, easily igniting surrounding flammable materials. Therefore, researching non-flammable construction techniques for overhead transmission line grounding grids is both urgent and necessary.

[0003] Existing research and development on non-fired connection of round steel grounding electrodes includes, for example, the bolt-type grounding grid connection process developed by Sichuan Mianyang Power Company. In this process, the ends of the round steel grounding electrode are threaded on the construction site, and then a specially made sleeve with positive and negative internal threads is used for threaded connection. This connection process requires special threading tools, is relatively complex and cumbersome, has strict requirements on the dimensional tolerances of the grounding electrode, and seriously damages the anti-corrosion coating of the grounding electrode. For example, Wuxi Yaming Electric Power Engineering Technology Co., Ltd. proposed a grounding electrode connection method using stainless steel bushings for hydraulic connection. On-site, a large-tonnage hydraulic press and a special tubular stainless steel connector are used to connect the stainless steel-clad round steel grounding electrodes. This method is mainly for stainless steel-clad composite grounding materials. For grounding materials with anti-corrosion coatings such as hot-dip galvanized steel and copper-clad steel, hydraulic connection will damage the anti-corrosion coating. Furthermore, neither of the existing two processes for connecting round steel grounding electrodes has a sealing function, meaning it cannot prevent the infiltration of soil solutions when the connection structure is in the soil, causing corrosion to the joint section of the two round steel grounding electrodes. Therefore, this reduces the lightning protection and conductivity function of the round steel grounding electrode and increases the probability of breakage. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the anti-corrosion coating of round steel grounding bodies is damaged when connecting them without flame in the prior art, and to provide a threaded tapered sleeve crimping connector for connecting round steel grounding bodies.

[0005] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a threaded tapered sleeve press-fit connector for connecting round steel grounding bodies, comprising a connector for connecting round steel bodies; the connector includes a double-ended screw cylinder with an internal variable diameter channel, wherein the inner diameter at the center of the variable diameter channel is smaller than the inner diameter at both ends, and both ends of the double-ended screw cylinder are provided with threaded portions.

[0006] The clamping component includes a conical clamping cylinder with deformation grooves on its outer periphery;

[0007] The locking assembly includes a threaded cap that is threaded to the threaded portion, and a seal is provided at the end of the threaded cap opposite to the double-ended screw barrel.

[0008] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the sealing element includes a constricted cylinder fixedly disposed at the outer end of the threaded cap, the outer wall of the constricted cylinder being fixedly connected to the inner wall of the threaded cap, and a sealing ring being fixedly disposed on the inner ring of the constricted cylinder.

[0009] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the outer circumferential surfaces of both ends of the double-ended screw cylinder are larger than the threaded cap, the sealing element includes a constricted cylinder fixed on the threaded cap, the inner ring of the constricted cylinder is provided with an annular sealing airbag, the sealing airbag is connected to the vent hole on the threaded cap, the vent hole is arranged radially along the threaded cap, the vent hole is connected to the top pressure hole opened on the threaded cap, the top pressure hole is arranged axially along the threaded cap, a top pressure plug is slidably provided in the top pressure hole, one end of the top pressure plug extends out of the top pressure hole, so as to squeeze the air in the top pressure hole into the sealing airbag after being pressed.

[0010] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the vent hole is provided radially through the threaded cap, and a sealing screw is threadedly connected to the vent hole away from the sealing airbag.

[0011] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the cross-section of the inflated sealing airbag is L-shaped, a snap ring is fixedly provided on the outer wall of the sealing airbag, the snap ring is snapped into the snap groove opened on the inner wall of the constricted cylinder, and a mating nozzle is provided on the outer periphery of the sealing airbag corresponding to the vent hole, the mating nozzle is snapped into the vent hole.

[0012] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the threaded cap is hexagonal, with six vent holes and six pressure holes, which are respectively located at the six apex corners of the threaded cap.

[0013] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the end of the top pressure plug protruding from the top pressure hole is provided with a frosted layer.

[0014] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the narrow opening of the variable diameter channel is smaller than the narrow opening of the clamping cylinder.

[0015] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the outer periphery of the double-ended screw cylinder is hexagonal.

[0016] As a further optimization of the threaded tapered sleeve crimping connector for connecting round steel grounding bodies according to the present invention: the surface of the crimping cylinder is provided with an elastic layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention uses a double-ended screw cylinder and a variable-diameter channel within the double-ended screw cylinder to compress a clamping component fitted onto a round steel body. Subsequently, the clamping cylinder, with deformation grooves on its outer periphery, deforms, thereby compressing the round steel body to increase the friction between the round steel body and the variable-diameter channel. This allows two sections of round steel body to be connected together without the use of an open flame. Furthermore, by increasing friction through a single compression method, the anti-corrosion coating on the surface of the round steel body is not damaged.

[0019] Furthermore, by providing a threaded cap and a sealing member on the threaded cap as part of the locking assembly, the present invention seals the two ends of the double-ended screw cylinder with openings after connecting them to the round steel body when the threaded cap is threadedly connected to the double-ended screw cylinder. This reduces the probability of soil solution entering the double-ended screw cylinder, thereby greatly reducing the probability of soil solution entering the double-ended screw cylinder and causing corrosion at the separation section of the two round steel bodies. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the axial structure of Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-section of Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the connector of the present invention;

[0023] Figure 4 This is a schematic diagram of the axial side structure of the clamping component of the present invention;

[0024] Figure 5 This is a schematic diagram of the locking assembly structure according to Embodiment 1 of the present invention;

[0025] Figure 6 This is a schematic cross-sectional view of the locking assembly according to Embodiment 1 of the present invention;

[0026] Figure 7 This is a schematic diagram of the axial structure of Embodiment 2 of the present invention;

[0027] Figure 8 This is a schematic diagram of the cross-section of Embodiment 2 of the present invention;

[0028] Figure 9 This is a schematic diagram of the locking assembly structure according to Embodiment 2 of the present invention;

[0029] Figure 10This is a schematic cross-sectional view of the locking assembly according to Embodiment 2 of the present invention;

[0030] The markings in the diagram are: 1. Round steel body; 2. Locking assembly; 201. Threaded cap; 202. Seal; 2021. Sealing ring; 2022. Reducing cylinder; 2023. Snap-fit ​​groove; 2024. Snap-fit ​​ring; 2025. Sealing airbag; 2026. Vent hole; 2027. Sealing screw; 2028. Butt joint; 2029. Top pressure plug; 20210. Top pressure hole; 3. Connector; 301. Double-ended screw barrel; 302. Variable diameter channel; 303. Threaded part; 4. Clamping part; 401. Clamping cylinder; 402. Deformation groove. Detailed Implementation

[0031] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0032] <Example 1>

[0033] like Figure 1 and Figure 2 As shown, a threaded tapered sleeve crimping connector for connecting round steel grounding electrodes has a connector 3 for crimping the two round steel bodies 1 at both ends. Both ends of the connector 3 are equipped with crimping parts 4 to press the two round steel bodies 1 into the connector 3, so that the two round steel bodies 1 are connected together without open flame. The two round steel bodies 1 are connected by crimping and locking. The crimping parts 4 will not rotate and wear the surface of the round steel bodies 1, nor will they cause significant changes to the structure and surface shape of the round steel bodies 1, that is, they will not damage the anti-corrosion coating on the surface of the round steel bodies 1. Both ends of the connector 3 are provided with locking components 2. The two locking components 2 are used to cooperate with the connector 3 to position the crimping parts 4 in the connector 3 to maintain the stable connection of the two round steel bodies 1. The two locking components 2 can seal both ends of the connector 3 to prevent the entry of soil solution, that is, reduce the corrosion of the two round steel bodies 1 by the soil solution.

[0034] like Figure 3 As shown, the connector 3 is a double-ended screw barrel 301 with a variable diameter channel 302 in its inner hole. Both ends of the screw barrel 301 have threaded portions 303. The inner diameter at the center of the variable diameter channel 302 is smaller than the inner diameter at both ends. Both ends of the variable diameter channel 302 are fitted with clamping parts 4, such as... Figure 4As shown, the clamping component 4 is a clamping cylinder 401 with one end smaller than the other. The clamping cylinder 401 has uniformly opened deformation grooves 402. Specifically, the narrow opening of the variable diameter channel 302 is smaller than the narrow opening of the clamping cylinder 401. After the two clamping cylinders 401 are respectively inserted into the two ends of the variable diameter channel 302, the two clamping cylinders 401 deform under the cooperation of the variable diameter channel 302 to lock the two round steel bodies 1 into the double-ended screw cylinder 301. Specifically, the surface of the clamping cylinder 401 is provided with an elastic layer. The elastic layer can further reduce the damage to the anti-corrosion coating on the surface of the round steel body 1. At the same time, it can also allow the double-ended screw cylinder 301 to cooperate with the two clamping cylinders 401 to adapt to the connection of round steel bodies 1 of different thicknesses, and connect the two round steel bodies 1 together without the use of open flame.

[0035] like Figure 5 and Figure 6 As shown, the locking component 2 is a threaded cap 201. The threaded cap 201 can engage with the threaded portion 303, which has an external thread, to push the two clamping cylinders 401 and drive the corresponding two round steel bodies 1 into the double-ended screw cylinder 301. At the same time, the threaded connection between the two threaded portions 303 and the two threaded caps 201 can lock the relative position of the clamping cylinders 401 in the double-ended screw cylinder 301 to stably connect the two round steel bodies 1. The threaded cap 201 is provided with a sealing element 202. The sealing element 202 includes a constricted cylinder 2022 fixedly provided on the threaded cap 201. The constricted cylinder 2022 is positioned away from the double-ended screw cylinder 301, and a sealing ring 2021 is fixedly provided on the inner wall of the constricted cylinder 2022. The sealing ring 2021 can press against the surface of the round steel body 1 to engage with the threaded connection between the threaded cap 201 and the double-ended screw cylinder 301, sealing both ends of the double-ended screw cylinder 301 to reduce the probability of soil solution entering, that is, to reduce the probability of soil solution damaging the round steel body 1.

[0036] like Figure 3 , Figure 5 and Figure 6 As shown, the outer surface of the double-ended screw cylinder 301 is hexagonal, so that the operator can use a wrench to clamp the double-ended screw cylinder 301. The outer surface of the threaded cap 201 is also hexagonal, so that the operator can use a wrench to clamp the threaded cap 201. That is, the operator can use two wrenches to clamp the threaded cap 201 and the double-ended screw cylinder 301, and then tighten the threaded cap 201 onto the double-ended screw cylinder 301, so as to complete the connection of the two round steel bodies 1 without the use of open flame.

[0037] In practical use, firstly, the two threaded caps 201 and the constricted sleeve 2022 are fitted onto the two round steel bodies 1. Then, the clamping sleeve 401 with deformation groove 402 is fitted onto the two round steel bodies 1. Next, the two round steel bodies 1 and the corresponding clamping sleeves 401 are fed into the two ends of the double-ended screw cylinder 301 one by one. After the clamping sleeve 401 and the round steel body 1 are fed into the diameter-changing channel 302 inside the double-ended screw cylinder 301, the double-ended screw cylinder 301 can be opened by using a wrench in conjunction with its outer surface. The double-ended screw barrel 301 and the threaded cap 201 are threaded together. During the connection process, the threaded cap 201 will press against the cylinder 401 to make the double-ended screw barrel 301 and the corresponding round steel body 1 securely connected. After repeated operation, the two round steel bodies 1 can be stably connected together. At the same time, the sealing ring 2021 set in the threaded cap 201 will also seal the round steel body 1, thereby reducing the probability of soil solution entering the double-ended screw barrel 301 and corroding the round steel body 1.

[0038] <Example 2>

[0039] like Figure 7 and Figure 8As shown, this embodiment differs from Embodiment 1 in that the sealing element 202 includes a sealing airbag 2025 on the inner wall of the constricted cylinder 2022. The sealing airbag 2025 is L-shaped, and a vent hole 2026 that vertically penetrates the threaded cap 201 is connected to the outer periphery of the sealing airbag 2025. The vent hole 2026 is connected to a top pressure hole 20210 opened on the threaded cap 201. A sealing screw 2027 is threadedly connected to the vent hole 2026 away from the center of the threaded cap 201 to press the top pressure hole 20210. The pressure hole 20210 is unidirectionally connected to the sealing airbag 2025, and a pressure plug 2029 slides inside the pressure hole 20210. When the threaded cap 201 is tightened and screwed into the double-ended screw barrel 301, the pressure plug 2029 is restricted by the stepped platform of the double-ended screw barrel 301 with the threaded portion 303. Subsequently, the pressure plug 2029 will squeeze the air in the pressure hole 20210, allowing the air to enter the sealing airbag 2025 through the vent hole 2026, thereby causing the sealing airbag 2025 to... 5. The expansion and pressure of the double-ended screw cylinder 301 and the round steel body 1, while sealing the double-ended screw cylinder 301, applies axial force to the threaded cap 201. At the same time, the air pressure also presses the pressure plug 2029 against the stepped platform of the double-ended screw cylinder 301, i.e., the double-ended screw cylinder 301 is larger than the outer circumference of the threaded cap 201, to further maintain the axial force applied to the threaded cap 201. Preferably, the end face of the pressure plug 2029 protruding from the pressure hole 20210 is provided with a frosted layer, which can increase the screw cap 201's ability to unscrew. The force required when connecting the head screw 301 increases the stability of the connected round steel body 1, which in turn reduces the probability of the threaded cap 201 coming loose from the head screw 301, thus increasing the stability of the connection between the two round steel bodies 1. Furthermore, the expansion of the sealing airbag 2025 can accommodate round steel bodies 1 of different thicknesses within a certain range. The expanded sealing airbag 2025 will also more stably seal both ends of the head screw 301, further reducing the probability of soil solution entering and corroding the disconnected surface of the two round steel bodies 1.

[0040] The sealing screw 2027 allows operators to easily adjust the inflation volume of the sealing airbag 2025, thus adapting to different round steel bodies 1. It also allows for inspection of soil solution seepage at the connection between the double-ended screw barrel 301 and the threaded cap 201 without disassembling the threaded cap 201, by deflating the sealing airbag 2025. Furthermore, it facilitates cleaning of the pressure hole 20210 and the vent hole 2026.

[0041] like Figure 9 and Figure 10As shown, multiple vent holes 2026 and pressure holes 20210 are provided and are evenly distributed at the apex of the hexagonal threaded cap 201. The multiple pressure holes 20210 and vent holes 2026 can cooperate with the multiple pressure plugs 2029 to provide a basis for the uniform expansion of the sealing airbag 2025, so that the sealing airbag 2025 can uniformly expand and stably seal the double-ended screw cylinder 301. At the same time, it can also provide a strong and uniform axial force for the threaded cap 201, thereby reducing the loosening of the round steel body 1 caused by the loosening of the threaded cap 201, and further reducing the possibility of soil solution entering and corroding the round steel body 1 due to loosening.

[0042] The inner wall of the constricted cylinder 2022 is provided with snap-fit ​​grooves 2023 on both the horizontal and vertical sections corresponding to the sealing airbag 2025. The L-shaped sealing airbag 2025 is provided with snap-fit ​​rings 2024 on both the horizontal and vertical sections near the threaded cap 201. Both the snap-fit ​​rings 2024 and the snap-fit ​​grooves 2023 are annular. Multiple mating nozzles 2028 are evenly provided on the vertical outer circumference of the sealing airbag 2025. The multiple mating nozzles 2028 correspond to multiple vent holes 2026. The vent holes 2026 are sealed and snapped with the mating nozzles 2028 near the sealing airbag 2025, which facilitates the disassembly and replacement of the sealing airbag 2025 by the staff, thereby improving the service life of the structure to a certain extent.

[0043] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A threaded taper sleeve compression fitting for round steel grounding body connections, characterized by: It includes connecting piece (3) for connecting round steel body (1), both ends of connecting piece (3) are adapted with compression piece (4), and both ends of connecting piece (3) are provided with locking assembly (2), connecting piece (3) includes double-end screw cylinder (301) with variable diameter channel (302) inside, the inner diameter of the center of variable diameter channel (302) is less than the inner diameter of both ends, both ends of double-end screw cylinder (301) are provided with threaded part (303); The compression piece (4) includes a tapered compression cylinder (401) with a deformation groove (402) on the outer periphery; The locking assembly (2) includes a threaded cap (201) threadedly connected with the threaded part (303), and the end of the threaded cap (201) away from the double-end screw cylinder (301) is provided with a sealing element (202); The outer periphery of both ends of the double-end screw cylinder (301) is larger than the threaded cap (201), and the sealing element (202) includes a necked cylinder (2022) fixedly arranged on the threaded cap (201), an annular sealing air bag (2025) is arranged on the inner ring of the necked cylinder (2022), the sealing air bag (2025) is in communication with a vent hole (2026) on the threaded cap (201), the vent hole (2026) is arranged along the radial direction of the threaded cap (201), the vent hole (2026) is in communication with a top pressing hole (20210) formed on the threaded cap (201), the top pressing hole (20210) is arranged along the axial direction of the threaded cap (201), and a top pressing plug column (2029) is slidably arranged in the top pressing hole (20210), one end of the top pressing plug column (2029) penetrates out of the top pressing hole (20210) to extrude the air in the top pressing hole (20210) into the sealing air bag (2025) after being pressed; The vent hole (2026) is arranged through the threaded cap (201) along the radial direction of the threaded cap (201), and a sealing screw (2027) is threadedly connected with the vent hole (2026) away from the sealing air bag (2025).

2. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The sealing element (202) includes a necked cylinder (2022) fixedly arranged on the outer end of the threaded cap (201), and the outer wall of the necked cylinder (2022) is fixedly connected with the inner wall of the threaded cap (201), and a sealing ring (2021) is fixedly arranged on the inner ring of the necked cylinder (2022).

3. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The cross section of the sealing air bag (2025) after inflation is L-shaped, the outer wall of the sealing air bag (2025) is fixedly provided with a clamping ring (2024), the clamping ring (2024) is clamped with a clamping groove (2023) formed on the inner wall of the necked cylinder (2022), and the outer periphery of the sealing air bag (2025) corresponding to the vent hole (2026) is provided with a butt joint nozzle (2028), and the butt joint nozzle (2028) is clamped with the vent hole (2026).

4. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The threaded cap (201) is hexagonal, and the vent hole (2026) and the top pressing hole (20210) are provided with six, and the six vent holes (2026) and the top pressing holes (20210) are respectively arranged at the six top corners of the threaded cap (201).

5. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The end of the top pressing plug column (2029) penetrating out of the top pressing hole (20210) is provided with an abrasive layer.

6. A threaded cone sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The narrow opening of the variable diameter channel (302) is smaller than the narrow opening of the compression cylinder (401).

7. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The outer periphery of the double-end screw cylinder (301) is hexagonal.

8. A threaded taper sleeve compression connector for connecting a round steel grounding body as set forth in claim 1, characterized in that: The pressing cylinder (401) is provided with an elastic layer on the surface.

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